Improvement in car-springs



L C PICKELS.

Car-Springs.

Patented April 21,1874.

WITJVESSES I @@.76 SMM I 'By NITED STATES' PATENT OFFICE.

JAMES PIOKELS, OF WILMINGTON, DELAWARE, ASSIGNOR TO HIMSELF AND JAMES I.HAYES, OF SAME PLACE.

IMPROVEMENT IN CARSPRINGS.

Specification forming part of Letters Patent No. 150,077, dated April21, 1874; application filed February 13, 1874.

To all whom t may concer'uf Be it known that I, JAMES O. PIGKELS, oflVilmington, in the county of New Castle and State of Delaware, haveinvented a certain new and useful Improvement in Railway-Oar Springs;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it pertains to make and use it, reference being had to theaccompanying drawings, which form part of this specification, in which-Figure lis a vertical longitudinal section, and Fig. 2 a side view ofthe two coils separated.

My invention has for its object to provide a car-spring which will rideeasily with either alight or heavy load, and which will be at oncestrong', elastic, and durable. The natu-re of my invention consists inthe novel construction and combination of parts as hereinafter fullydescribed, having reference particularly to, first, the combination of acentral indiarubber plug with surrounding cast-steel spiral coils,arranged right and left alternately, forming a nest; secondly, theemployment of an equaliZng-bearing, in combination with coils ot equallength, these parts being so arranged that the weight imposed upon thespring will iirst take eii'ect upon the outer coil, and, as said weightincreases, will take eifect on the inner coil, thus proportioning theresistance according' to the increase of weight.

Referring to the accompanying drawing, which illustrates my invention, AA are, respectively, the upper and lower sections of a box containingvthe springs. B and O are cast-steel spiral springs, of which any numbergreater than two may be employed, of equal length, and placed one withinthe other, as shown, to form a rest. D is a rubber plug, retained bycompression in the position shown, or, if desired, resting upon abearing beneath. The equalizing-bearing is shown at E, and is formed byrecessin g the topand bottom plates, or the top plate only, of thebox-sections A and A, in such manner that the superincumbent weight willfirst fall upon the outer spring B, then, as the load increases, uponthe next spring O, and so on, if more than two coils be employed,proportioning the resistance to the gravity, and preserving a due amountof elasticity under la heavy as well as under a light burden. Should theweight imposed be too great for the spirals alone it will take effect onthe rubber plug, which may, if desired, be of equal length or verticalsection with the spirals, or may, as shown, be shorter, its ends impinging upon the studs e e at top and bottom, or upon a flat bearing at thebottom and upon a projection, e, at the top, when the upper section A ofthe box is duly depressed under weight.

The box formed of the sections A A is made of cast-iron, and designed tocontain any number-as four, live, or six--of nests of springs made up ofthe right and left alternate castn steel coils and rubber plug, as abovedcscribed.

A spring thus constructed combines all the essential requisites ofstrength, elasticity, and durability. A car provided with such springswill ride easy, whether empty or lightly or heavily loaded, and noordinary burden will bring it to a solid bearing.

What I claim as my invention is- 1. The equalizing-bearing E, recessedso as to cause the superincumbent weight imposed upon the spring to fallirst on the outer coil, and then on the inner coil or coils, allcombined substantially as shown and described.

2. In combination with the sections A and A', having equalizing-bearingsE, the right and left coils B O of equal length, and the rubber block D,substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this9th day of February, 1874.

JAMES O. PIOKELS.

Witnesses: y l

EUGENE P. EAnsoN, JNO. A. BELL.

